Re: Rép. : Setting IP redunduncay in AS/400

That would work.

In our case, we also link VIP2 to IP1 so if IP1 fails, Itera traffic will go to IP2 with user trafic.

VIP1 is linked to IP1 and IP2 (in that order) so traffic goes trough IP1. It goes trough IP2 only if IP1 fails (no load balancing).
VIP2 is linked to IP2 and IP1 (in that order) so traffic goes trough IP2. It goes trough IP1 only if IP1 fails (no load balancing).

This technique do not provide load balancing of the traffic. The second IP is more a hot standby. If you want to load balance your traffic, you will need to use VIOS to do so (I think).



Denis Robitaille
Chef de service TI
Cascades Centre des technologies,
une division de Cascades Canada ULC

412 Marie Victorin
Kingsey falls(Québec) Canada J0A 1B0
T : 819 363 6130


Pour toute information sur les événements techniques, veuillez consulter notre calendrier Groupwise CAS_CALENDRIER_TI

Vikhyath Kamath <vikyat_kaamath@xxxxxxxxx> 2013-10-01 11:51 >>>

Hi,

So are you saying. We have two VIPs and two physical IPs.

Just to confirm you are suggesting the below setup.

1) Create Two Virtual IPs. VIP1 and VIP2
2) Create Two IPs for two actual Interface (LAN adaptors). - IP1 and IP2
3) Link VIP1 to IP1 and IP2;.. users access VIP1, traffic routed through both IP1 and IP2
4) Link VIP2 to IP2 only, ITERA is linked to this IP. Only Itera traffic goes through VIP2
5) Incase IP1 fails, VIP1 automatically routes traffic to IP2 which is being used by Itera too.

Please confirm.

Thanks and Regards,
Vik.



________________________________
From: Denis Robitaille <denis_robitaille@xxxxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Sent: Tuesday, October 1, 2013 8:58 PM
Subject: Re: Rép. : Setting IP redunduncay in AS/400


Yes, you could since LINETH02 has it's own IP adress.

We use Vision and what we do here is:
Create a second Virtual IP for Vision (or Itera in your case).
Link it to the same phisical interface, but in reverse order (user are routed to LINETH01 and Vision to LINETH02 when everything is nomal) If one interface fails, both traffic will go to the same physical interface, but still trough different virtual ones.



Denis Robitaille
Chef de service TI
Cascades Centre des technologies,
une division de Cascades Canada ULC

412 Marie Victorin
Kingsey falls(Québec) Canada J0A 1B0
T : 819 363 6130


Pour toute information sur les événements techniques, veuillez consulter notre calendrier Groupwise CAS_CALENDRIER_TI

Gqcy <gmufasa01@xxxxxxxxx> 2013-10-01 11:17 >>>

if we would do this....
could you still route mimix or iTera traffic to a specific line (in the
example below "LINETH02")?

all other traffic (http, telnet, ftp, odbc/jdbc) could point to virtual?

would it make sense to do so?



On 10/1/2013 9:47 AM, Denis Robitaille wrote:

We do this using "proxy ARP"

First create the 2 actual interface:
ADDTCPIFC INTNETADR('x.x.x.x') LIND(LINETH01) SUBNETMASK('x.x.x.x') LCLIFC(‘y.y.y.y’)
ADDTCPIFC INTNETADR('x.x.x.x') LIND(LINETH02) SUBNETMASK('x.x.x.x') LCLIFC(‘y.y.y.y’)

Then create the virtual IP adress (this is the one that will get used by users ans linked to your DNS):
ADDTCPIFC INTNETADR('y.y.y.y') LIND(*VIRTUALIP) SUBNETMASK('255.255.255.255')

Then you activate the proxy ARP using the navigator:
- You go to Network/TCPIP configuration/IPv4/Interface
- right click on the virtual interface and select Properties
- selcect Advanced
- Activate the proxy ARP protocol (the interface must be varied off to be able to do this)

Finnaly, you must link the physical interface with the virtual one:
- You go to Network/TCPIP configuration/IPv4/Interface
- right click on the virtual interface and select Properties
- selcect Advanced
- Choose among the available inetrface and add them to prefered

The wording may not be exact (our systems are in french) but those are the main steps





Denis Robitaille
Chef de service TI
Cascades Centre des technologies,
une division de Cascades Canada ULC

412 Marie Victorin
Kingsey falls(Québec) Canada J0A 1B0
T : 819 363 6130


Pour toute information sur les événements techniques, veuillez consulter notre calendrier Groupwise CAS_CALENDRIER_TI

Vikhyath Kamath<vikyat_kaamath@xxxxxxxxx> 2013-10-01 09:22>>>

Hi,

We have 5 LPARs on each of our servers. Recently we faced an issue where the LAN adaptor of iseries system failed and we had a five hour outage.
I was considering if we could have IP redundency - so that each LPAR would have 2 IPs pointing one IP which the user access. So if one IP fails, there is a fail-over to the other IP. Could some please guide how this is done in AS/400 system?

Thanks and Regards,
Vik.